Its their platform and their reputation. If some users don’t like what “Musk” do, then they have right to make and read news about it, regardless of de jure rights, EULA and whatnot.

PS: And yes, the owner’s account was renamed in a rather nonchalant “fuck you” way. I would never learn about this, without these news.

It can end in many ways. Some of them more terrifying that your version, others not.

Oh they are switching from “Its not real” to “its all over, we can’t do anything, so invest in fossils even more” (the invest part is an exaggeration). I want to believe that most of those messages are from paid actors (oil industry, authoritarian regimes).